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Problem set. Graph Theory Problems
Solved problems:
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ID
Title
Source
Authors
Difficulty
1004
Sightseeing Trip
Central European Olympiad in Informatics 1999
2722
579
1008
Image Encoding
USTU PhysTech Cup 2000
4310
366
1016
Cube on the Walk
USU Local Contest. 1999
1903
823
1022
Genealogical Tree
Autumn School Contest 2000
11093
142
1033
Labyrinth
Ural Championship 1999
6616
237
1035
Cross-stitch
Ural Championship 1999
1135
1367
1040
Airline Company
USU Championship 2000
1543
1000
1045
Funny Game
USU Local Contest. March 2000
2936
521
1056
Centers of the Net
NEERC 2000 Central Subregional
2774
550
1065
Frontier
NEERC 2000
1014
1416
1069
Prufer Code
USU Personal Contest 2001
2744
512
1072
Routing
USU Personal Contest 2001
2795
502
1076
Trash
1961
711
1077
Travelling Tours
1273
395
1080
Map Coloring
Winter Mathematical Festival Varna 2001
7454
187
1085
Meeting
Spring School Contest 2001
2195
627
1096
Get the Right Route Plate!
USU Local Contest. March 2001
1846
707
1099
Work Scheduling
1030
1142
1106
Two Teams
Tetrahedron Team Online Contest May 2001
6840
74
1109
Conference
Bulgarian Online Contest September 2001
2015
250
1119
Metro
Autumn School Contest 2001
7241
70
1124
Mosaic
USU Championship 2001
1694
298
1128
Partition into Groups
USU Championship 2001
1221
412
1129
Door Painting
USU Championship 2001
1252
402
1136
Parliament
NEERC 2001 Central Subregional
5077
100
1137
Bus Routes
NEERC 2001 Central Subregional
1588
318
1145
Rope in the Labyrinth
DSAP Vietnam Online Contest November 2001
1460
346
1156
Two Rounds
Ural Championship 2001. Round 2
1578
320
1160
Network
NEERC 2001 Northern Subregional
3542
145
1162
Currency Exchange
NEERC 2001 Northern Subregional
2638
192
1176
Hyperchannels
USU Personal Contest 2002
1512
335
1182
Team Them Up!
NEERC 2001
994
508
1198
Jobbery
1074
488
1199
Mouse
117
3824
1205
By the Underground or by Foot?
USU Local Contest. March 2002
2158
235
1208
Legendary Teams Contest
USU Local Contest. March 2002
2409
211
1210
Kind Spirits
Autumn School Contest 2002
3036
169
1218
Episode N-th: The Jedi Tournament
USU Championship 2002
1581
323
1227
Rally Championship
NEERC 2002 Central Subregional
1693
302
1237
Evacuation Plan
NEERC 2002
513
985
1242
Werewolf
USU Personal Contest 2003
2939
175
1250
Sea Burial
USU Local Contest. March 2003
702
725
1254
Die Hard
USU Local Contest. March 2003
789
646
1270
Unicube
USU Championship 2003
218
2281
1271
Sailing Directions
USU Championship 2003
106
4483
1272
Non-Yekaterinburg Subway
USU Championship 2003
3523
147
1277
Cops and Thieves
NEERC 2003 Central Subregional
591
866
1280
Topological Sorting
NEERC 2003 Central Subregional
3698
140
1281
River Basin
NEERC 2003 Central Subregional
279
1800
1291
Gear-wheels
Spring School Contest 2004
1355
383
1301
Cube in Labyrinth
Ural Championship 1998
706
730
1314
Chase in Subway
Ural Championship 2004. Round 1
920
562
1315
MDPAR and MIIAR
Ural Championship 2004. Round 1
276
1827
1320
Graph Decomposition
Ural Championship 2004. Round 2
1812
287
1323
Classmates
Ural Championship 2004. Round 2
620
830
1325
Dirt
Ural Championship 2004. Round 2
969
534
1329
Galactic History
Autumn School Contest 2004
1142
456
1337
Bureaucracy
Autumn School Contest 2004
334
1527
1338
Automobiles
USU Championship 2004
293
1739
1339
Babies
USU Championship 2004
606
855
1358
Cables
Spring School Contest 2005
967
540
1361
Spaceology vs. Chronistics
Ural Championship 2005. Round 2
270
1885
1367
Top Secret
Ural Championship 2005. Round 2
176
2837
1379
Cups Transportation
Ural Championship 2005. Round 1
897
583
1392
Dreaming of Stars
682
765
1399
Economical Director
42
9337
1400
Cellular Characters
Autumn School Contest 2005
953
549
1416
Confidential
USU Championship 2005
1361
385
1419
Maps of the Island Worlds
USU Championship 2005
425
1213
1421
Credit Operations
Timus Top Coders: First Challenge
942
543
1434
Buses in Vasyuki
USU Personal Contest 2006
576
880
1441
From the History of Gringotts Bank
Ural Championship 2006
440
1139
1447
Portkey Network
Ural Championship 2006
515
977
1449
Credit Operations 2
Timus Top Coders: Second Challenge
336
1474
1450
Russian Pipelines
Timus Top Coders: Second Challenge
3389
150
1479
Scheduled Checking
Petrozavodsk Summer 2006. Ural+Orel Contest
110
4125
1487
Chinese Football
USU Championship 2006
386
1247
1500
Pass Licenses
NEERC 2006 Eastern Subregional
757
641
1505
Oil Transfer
NEERC 2006 Eastern Subregional
161
2876
1527
Bad Roads
Petrozavodsk Winter 2007. D.Gozman Contest
413
1137
1533
Fat Hobbits
USU Personal Contest 2007
480
979
1544
Classmates 3
Ural Championship 2007
368
1258
1557
Network Attack
Petrozavodsk Summer 2007. NSU Contest
259
1715
1569
Networking the “Iset”
USU Championship 2007
501
901
1575
Yekaterinburg Subway 2
Autumn School Contest 2007
523
862
1580
Dean's Debts
Autumn School Contest 2007
511
882
1610
Cactuses
Ural Championship 2008
211
2012
1623
Fractal Labyrinth
Petrozavodsk Winter 2008. ITMO Contest
129
3112
1630
Talisman
USU Championship 2008
416
1005
1641
Duties
Autumn School Contest 2008
832
507
1643
Attack of the Dark Fortress
Autumn School Contest 2008
993
425
1651
Shortest Subchain
NEERC 2008 Eastern Subregional
1225
345
1652
Banking Crisis
NEERC 2008 Eastern Subregional
149
2680
1664
Pipeline Transportation
Petrozavodsk Winter 2008. USU Contest
205
1963
1676
Mortal Kombat
Petrozavodsk Summer 2008. USU Contest
235
1716
1691
Algorithm Complexity
Petrozavodsk Winter 2009. USU Contest
134
2883
1699
Turning Turtles
Petrozavodsk Winter 2009. USU Contest
376
1075
1709
Penguin-Avia
Ural Championship 2009
2684
153
1721
Two Sides of the Same Coin
NEERC 2009 Eastern Subregional
680
577
1742
Team building
Petrozavodsk Summer 2009. Ufa SATU Contest
1246
310
1770
The Party of Ural Champions
Ural Championship 2010
211
1735
1806
Mobile Telegraphs
NEERC 2010 Eastern Subregional
2005
183
1833
Hopes of Rowing
Ural Championship 2011
165
2024
1837
Isenbaev's Number
Ural Championship 2011
5929
60
1847
Zamkadye
Petrozavodsk Summer 2010. USU Contest
75
4043
1882
Old Nokia
Ural Regional School Programming Contest 2011
116
2708
1888
Pilot Work Experience
NEERC 2011 Eastern Subregional
730
460
1905
Travel in Time
Ural Championship 2012
269
1131
1912
Titan Ruins: Passing through Walls
NEERC 2012 Eastern Subregional
237
1275
1930
Ivan's Car
Ural Regional School Programming Contest 2012
1901
165
1934
Black Spot
Ural FU Championship 2012
869
357
1966
Cycling Roads
Ural FU Personal Contest 2013
429
679
1980
Road to Investor
Ural Championship 2013
455
635
1982
Electrification Plan
Ural FU Championship 2013
2212
130
2013
Neither shaken nor stirred
NEERC 2014 Eastern Subregional
271
946
2017
Best of a bad lot
NEERC 2014 Eastern Subregional
187
1350
2030
Awesome Backup System
Ural Regional School Programming Contest 2014
506
514
2034
Caravans
Ural Regional School Programming Contest 2014
916
286
2038
Minimum Vertex Cover
Petrozavodsk Summer 2014. Ural FU Contest
100
2397
2055
Urban Geography
Ural Championship 2015
161
1478
2093
All Roads Lead to Snowdrift
Ural FU Personal Contest 2014
154
1373
2113
Survive the flood
University-Academy Olympiad 2019
376
427
2127
Determinant of a Graph
Petrozavodsk Summer 2018. umnik_team contest
37
3461
2128
Rubina's Solitaire
Later is better than never
149
995
2132
Graph Decomposition. Version 2
Later is better than never
96
1493
2140
BitMazeCraft
Ural School Programming Contest 2019
122
1162
2147
City Building
Ural School Programming Contest 2019
73
1848
2155
Quadrocopter
Ural School Programming Contest 2020
120
981
2159
Essay
Ural School Programming Contest 2021
49
1333
2169
City Building 2
Ural School Programming Contest 2022
33
1827
2174
Dualism of Numbers
Ural School Programming Contest 2023
46
907
2180
Need More Tasks
Ural School Programming Contest 2023
24
1493
2187
Need More Gold
Ural School Programming Contest 2024
22
1586
2192
My Grandfather
ICPC Ural Regional Contest Qualifier 2022
43
958
2195
Binary Trees
ICPC Ural Regional Contest Qualifier 2023
17
1881
2198
Deep Understanding
ICPC Ural Regional Contest Qualifier 2024
28
1334
2200
He is not a knight for you 2
University-Academy Olympiad 2020
13
1332
2219
Philosophical Question
ICPC Ural Regional Contest Qualifier 2025
16
1176
2226
County of Squirrels
Ural Championship 2025
20
1020
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